| 摘要 |
PROBLEM TO BE SOLVED: To reduce cavitation resulting from a sudden pressure change during the input of large amplitude while securing damping performance in a normal using region. SOLUTION: A liquid-sealed chamber 18 formed between a vibration control base 16 and a diaphragm 20 has a partition portion 28. The partition portion 28 has an elastic film 34 for partitioning a main liquid chamber 18A from a sub liquid chamber 18B. A protrusion 38 is provided which is protruded from a main liquid chamber side film surface 34M of the elastic film 34 having the main liquid chamber side film surface 34M and a sub liquid chamber side film surface 34N, into the main liquid chamber 18A. In an elastic film portion 34B on which the protrusion is provided, a cut 40 is provided passing through the elastic film 34 including the protrusion 38 in a film thickness direction T. Thus, directivity is given to the opening of the cut 40 due to a sudden pressure change of the main liquid chamber 18A. COPYRIGHT: (C)2009,JPO&INPIT |
